I- You are provided with aspirin tablet 0.3 g & you are asked to do an acid-base titration:

           a) Write down the principle. 

           b) Show how do you calculate the F, Concentration and % deviation ( using N/10 standard, 0.2 gm aspirin, M.wt of aspirin:180)                   

Practical Exam:

You are provided with a sample containing:


            Ascorbic acid

            Zinc Sulfate.

1- For Ascorbic acid:

    Transfer 10 ml of the provided sample into a conical flask. Add 20 ml distilled water and 2 ml of starch mucilage indicator. Titrate with N/20 I2 ( Duplicate the titration ).